
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>login</title>
</head>
<body>
    <form action="">
        <input id="user" type="text" name="user" placeholder="请输入用户名"><br>
        <input id="pass" type="password" name="pass" placeholder="请输入密码"><br>
        <input id="btn" type="submit" value="登录">
    </form>

    
</body>
</html>